...
首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Structure and Magnetic Interaction in Organic Radical Crystals. 6. Spin-Transfer Crystals: A Theoretical Study
【24h】

Structure and Magnetic Interaction in Organic Radical Crystals. 6. Spin-Transfer Crystals: A Theoretical Study

机译:有机自由基晶体中的结构和电磁相互作用。 6.自旋转移晶体:理论研究

获取原文
获取原文并翻译 | 示例
           

摘要

The nature of the spin exchange interaction in half-filled bands of one-dimensional (1-D) stacks of mixed molecular radical crystals (MMRC) with he general formula …R~·…H…R…H… (R~·) is a π radical, and H is a diamagnetic polycyclic molecule) has been investigated theoretically. The intermolecular interaction is accompanied by spin transfer from R~· to H and determines the spin-spin interaction within the 1-D stacks of the MMRCs. The nature and the magnitude of the magnetic interaction in these structures are investigated using the band theory. At a given topology and geometry of the MMRC stacks the antiferromagnetic interaction in the parent molecular radical crystals …R~·…R~·… becomes ferromagnetic in the MMRCs and vice versa. It was found that the effective exchange integral J_(eff) of MMRCs, belong to a given group with one and the same radical but different H, is proportional to the diamagnetic susceptibility χ(H). A new topological effect of the exchange interaction in MMRCs is formulated.
机译:通式为…R〜·…H…R…H…(R〜·)的混合分子自由基晶体(MMRC)一维(1-D)堆栈的半填充带中的自旋交换相互作用的性质在理论上已经研究了π是一个π自由基,而H是一个反磁性多环分子)。分子间的相互作用伴随着从R〜·到H的自旋转移,并决定了MMRC的一维堆栈中的自旋-自旋相互作用。使用能带理论研究了这些结构中磁性相互作用的性质和强度。在给定的MMRC叠层拓扑和几何形状下,母分子自由基晶体中的反铁磁相互作用…R〜·... R〜·...在MMRC中变成铁磁的,反之亦然。研究发现,MMRCs的有效交换积分J_(eff)属于给定的基团,具有一个相同的基团但具有不同的H,与抗磁化率χ(H)成正比。提出了MMRC中交换相互作用的新拓扑效应。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号